CVE-2026-64668
- Source
- https://cve.org/CVERecord?id=CVE-2026-64668
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64668.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-64668
- Aliases
-
- GHSA-7583-9cqv-j9rf
- Published
- 2026-11-11T03:50:14Z
- Modified
- 2026-11-12T07:07:27Z
- Severity
-
- 7.4 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
- Summary
- pam_usb: deny_remote bypassed by zone-indexed IPv6 addresses (fe80::1%eth0) in pusb_tmux_has_remote_clients
- Details
-
pam_usb provides hardware authentication for Linux using removable media. From version 0.8.0 to before version 0.9.3, the deny_remote feature in pam_usb uses /usr/bin/w -i to detect whether the authenticating user has an active remote tmux session. In pusb_tmux_has_remote_clients() (src/tmux.c), the IPv6 detection pattern matched the address group and then immediately expected whitespace. On Linux systems with multi-homed network interfaces, w -i appends a zone index (scope identifier) to link-local IPv6 addresses — e.g. fe80::1%eth0. The %eth0 suffix appeared between the address and the next whitespace field, causing the regex match to fail even for an otherwise-matching remote session. The function returned "no remote clients" and granted access. This issue has been patched in version 0.9.3.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-285", "CWE-693" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64668.json" }- References
-
- https://github.com/mcdope/pam_usb/releases/tag/0.9.3
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64668.json
- https://github.com/mcdope/pam_usb/security/advisories/GHSA-7583-9cqv-j9rf
- https://nvd.nist.gov/vuln/detail/CVE-2026-64668
- https://github.com/mcdope/pam_usb/commit/a62513f3da871d6576d751de3482eb80b9ac79f3
- https://github.com/mcdope/pam_usb/pull/423
Affected packages
Git / github.com/mcdope/pam_usb
Affected ranges
- Type
- GIT
- Repo
- https://github.com/mcdope/pam_usb
- Events
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "0.8.0" }, { "fixed": "0.9.3" } ], "source": "AFFECTED_FIELD", "strategy": "StringRangeExpression" }, { "range": [ { "fixed": "a62513f3da871d6576d751de3482eb80b9ac79f3" } ], "source": "REFERENCES_COMMIT" }, { "original_tag": "0.9.3", "range": [ { "fixed": "9993723a2836c7de547ea380af521ed5f5b51651" } ], "source": "REFERENCES_TAG" } ] }
Database specific
source
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64668.json"
vanir_signatures
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vanir_signatures_modified
"2026-11-12T07:07:27Z"